Silver Sided Sector Spider

Z. x-notata females are up to 11mm in size, males up to 7mm. The prosoma is yellow-brown, with a leaf-like mark on the opisthosoma. In moderate climate, adults appear from July to October, sometimes even into December. In warmer regions, they are active all year.

This spider builds its web mostly into window frames, but can also be found on walls, fences, or under the bark of old trees. It is very common around boats and docks throughout the world.Adult spiders build an orb-web usually with two sectors without connecting threads in one of the two upper corners. The signalling thread in the middle of these sectors leads to the spider's retreat. In the evening and at night, however, the spider sits in the center of the web. It renews the web in the morning hours.

A normal web consists of about 25 to 30 radial threads. Young spiders, and sometimes adults, build webs without the free sectors, especially if the angle between signalling thread and radii gets too big.